This SMX-12 has a 3.5" chamber, 5 piece extended & ported choke tube set, original box, owner's manual, shims, sling swivels, sling, a fiber optic front sight, and an extra cheek rest. Get the best bang for your buck when you get a Certified Used Firearm. When you see the Certified Used stamp on any of our firearms, you can be confident that you're getting exactly what you want - a gun only in very good to excellent condition and held to the highest quality standard. All Certified Used Guns come with a 'no questions asked' return policy.